+#include "private.h"
#include "simdag/simdag.h"
#include "xbt/sysdep.h"
+#include "xbt/dynar.h"
-/* Creates a task.
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_task,sd,
+ "Logging specific to SimDag (task)");
+
+static void __SD_task_remove_dependencies(SD_task_t task);
+static void __SD_task_destroy_scheduling_data(SD_task_t task);
+
+/**
+ * \brief Creates a new task.
+ *
+ * \param name the name of the task (can be \c NULL)
+ * \param data the user data you want to associate with the task (can be \c NULL)
+ * \param amount amount of the task
+ * \return the new task
+ * \see SD_task_destroy()
*/
-SG_task_t SG_task_create(const char *name, void *data, double amount) {
+SD_task_t SD_task_create(const char *name, void *data, double amount) {
- xbt_assert0(amount >= 0, "Invalid parameter"); /* or amount > 0 ? */
+ SD_task_t task;
+ SD_CHECK_INIT_DONE();
+
+ task = xbt_new(s_SD_task_t, 1);
+
+ /* general information */
+ task->data = data; /* user data */
+ if (name != NULL)
+ task->name = xbt_strdup(name);
+ else
+ task->name = NULL;
+
+ task->state_hookup.prev = NULL;
+ task->state_hookup.next = NULL;
+ task->state_set = sd_global->not_scheduled_task_set;
+ task->state = SD_NOT_SCHEDULED;
+ xbt_swag_insert(task, task->state_set);
- SG_task_t task = xbt_new0(s_SG_task_t, 1);
-
- task->data = data;
- task->name = xbt_strdup(name);
task->amount = amount;
- task->remaining_amount = amount;
- task->state = SG_SCHEDULED; /* not sure... should we add a state SG_NOT_SCHEDULED? */
- /* TODO: dependencies + watch */
+ task->remains = amount;
+ task->start_time = -1.0;
+ task->finish_time = -1.0;
+ task->surf_action = NULL;
+ task->watch_points = 0;
+ task->state_changed = 0;
+
+ /* dependencies */
+ task->tasks_before = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
+ task->tasks_after = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
+
+ /* scheduling parameters */
+ task->workstation_nb = 0;
+ task->workstation_list = NULL;
+ task->computation_amount = NULL;
+ task->communication_amount = NULL;
+ task->rate = 0;
+
+ sd_global->task_number++;
return task;
}
-/* Schedules a task.
+/**
+ * \brief Returns the user data of a task
+ *
+ * \param task a task
+ * \return the user data associated with this task (can be \c NULL)
+ * \see SD_task_set_data()
*/
-int SG_task_schedule(SG_task_t task, int workstation_nb,
- SG_workstation_t **workstation_list, double *computation_amount,
- double *communication_amount, double rate) {
- xbt_assert0(task, "Invalid parameter");
- /* TODO */
+void* SD_task_get_data(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ return task->data;
+}
- return 0;
+/**
+ * \brief Sets the user data of a task
+ *
+ * The new data can be \c NULL. The old data should have been freed first
+ * if it was not \c NULL.
+ *
+ * \param task a task
+ * \param data the new data you want to associate with this task
+ * \see SD_task_get_data()
+ */
+void SD_task_set_data(SD_task_t task, void *data) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ task->data = data;
}
-/* Returns the data of a task.
+/**
+ * \brief Returns the state of a task
+ *
+ * \param task a task
+ * \return the current \ref e_SD_task_state_t "state" of this task:
+ * #SD_NOT_SCHEDULED, #SD_SCHEDULED, #SD_READY, #SD_RUNNING, #SD_DONE or #SD_FAILED
+ * \see e_SD_task_state_t
*/
-void* SG_task_get_data(SG_task_t task) {
- xbt_assert0(task, "Invalid parameter");
- return task->data;
+e_SD_task_state_t SD_task_get_state(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ return task->state;
}
-/* Sets the data of a task.
+/* Changes the state of a task. Updates the swags and the flag sd_global->watch_point_reached.
*/
-void SG_task_set_data(SG_task_t task, void *data) {
- xbt_assert0(task, "Invalid parameter");
- task->data = data;
+void __SD_task_set_state(SD_task_t task, e_SD_task_state_t new_state) {
+ xbt_swag_remove(task, task->state_set);
+ switch (new_state) {
+ case SD_NOT_SCHEDULED:
+ task->state_set = sd_global->not_scheduled_task_set;
+ break;
+ case SD_SCHEDULED:
+ task->state_set = sd_global->scheduled_task_set;
+ break;
+ case SD_READY:
+ task->state_set = sd_global->ready_task_set;
+ break;
+ case SD_IN_FIFO:
+ task->state_set = sd_global->in_fifo_task_set;
+ break;
+ case SD_RUNNING:
+ task->state_set = sd_global->running_task_set;
+ task->start_time = surf_workstation_model->common_public->
+ action_get_start_time(task->surf_action);
+ break;
+ case SD_DONE:
+ task->state_set = sd_global->done_task_set;
+ task->finish_time = surf_workstation_model->common_public->
+ action_get_finish_time(task->surf_action);
+ task->remains = 0;
+ break;
+ case SD_FAILED:
+ task->state_set = sd_global->failed_task_set;
+ break;
+ default:
+ xbt_assert0(0, "Invalid state");
+ }
+ xbt_swag_insert(task, task->state_set);
+ task->state = new_state;
+
+ if (task->watch_points & new_state) {
+ INFO1("Watch point reached with task '%s'!", SD_task_get_name(task));
+ sd_global->watch_point_reached = 1;
+ SD_task_unwatch(task, new_state); /* remove the watch point */
+ }
}
-/* Returns the name of a task.
+/**
+ * \brief Returns the name of a task
+ *
+ * \param task a task
+ * \return the name of this task (can be \c NULL)
*/
-const char* SG_task_get_name(SG_task_t task) {
- xbt_assert0(task, "Invalid parameter");
+const char* SD_task_get_name(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
return task->name;
}
-/* Returns the computing amount of a task.
+/**
+ * \brief Returns the total amount of a task
+ *
+ * \param task a task
+ * \return the total amount of this task
+ * \see SD_task_get_remaining_amount()
*/
-double SG_task_get_amount(SG_task_t task) {
- xbt_assert0(task, "Invalid parameter");
+double SD_task_get_amount(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
return task->amount;
}
-/* Returns the remaining computing amount of a task.
+/**
+ * \brief Returns the remaining amount of a task
+ *
+ * \param task a task
+ * \return the remaining amount of this task
+ * \see SD_task_get_amount()
*/
-double SG_task_get_remaining_amount(SG_task_t task) {
- xbt_assert0(task, "Invalid parameter");
- return task->remaining_amount;
+double SD_task_get_remaining_amount(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ if (task->surf_action)
+ return task->surf_action->remains;
+ else
+ return task->remains;
}
-/* Adds a dependency between two tasks.
+/* temporary function for debbuging */
+static void __SD_print_dependencies(SD_task_t task) {
+ xbt_dynar_t dynar;
+ int length;
+ int i;
+ SD_dependency_t dependency;
+
+ INFO1("The following tasks must be executed before %s:", SD_task_get_name(task));
+ dynar = task->tasks_before;
+ length = xbt_dynar_length(dynar);
+
+
+ for (i = 0; i < length; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ INFO1(" %s", SD_task_get_name(dependency->src));
+ }
+
+ INFO1("The following tasks must be executed after %s:", SD_task_get_name(task));
+
+ dynar = task->tasks_after;
+ length = xbt_dynar_length(dynar);
+ for (i = 0; i < length; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ INFO1(" %s", SD_task_get_name(dependency->dst));
+ }
+ INFO0("----------------------------");
+}
+
+/* Destroys a dependency between two tasks.
*/
-void SG_task_dependency_add(const char *name, void *data, SG_task_t src, SG_task_t dst) {
+static void __SD_task_dependency_destroy(void *dependency) {
+ if (((SD_dependency_t) dependency)->name != NULL)
+ xbt_free(((SD_dependency_t) dependency)->name);
+ xbt_free(dependency);
+}
+
+/**
+ * \brief Adds a dependency between two tasks
+ *
+ * \a dst will depend on \a src, ie \a dst will not start before \a src is finished.
+ * Their \ref e_SD_task_state_t "state" must be #SD_NOT_SCHEDULED, #SD_SCHEDULED or #SD_READY.
+ *
+ * \param name the name of the new dependency (can be \c NULL)
+ * \param data the user data you want to associate with this dependency (can be \c NULL)
+ * \param src the task which must be executed first
+ * \param dst the task you want to make depend on \a src
+ * \see SD_task_dependency_remove()
+ */
+void SD_task_dependency_add(const char *name, void *data, SD_task_t src, SD_task_t dst) {
+ xbt_dynar_t dynar;
+ int length;
+ int found = 0;
+ int i;
+ SD_dependency_t dependency;
+
+ SD_CHECK_INIT_DONE();
xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
- /* TODO */
+
+ dynar = src->tasks_after;
+ length = xbt_dynar_length(dynar);
+
+
+
+ if (src == dst)
+ THROW1(arg_error, 0, "Cannot add a dependency between task '%s' and itself",
+ SD_task_get_name(src));
+
+ if (!__SD_task_is_not_scheduled(src) && !__SD_task_is_scheduled_or_ready(src))
+ THROW1(arg_error, 0, "Task '%s' must be SD_NOT_SCHEDULED, SD_SCHEDULED or SD_READY", SD_task_get_name(src));
+
+ if (!__SD_task_is_not_scheduled(dst) && !__SD_task_is_scheduled_or_ready(dst))
+ THROW1(arg_error, 0, "Task '%s' must be SD_NOT_SCHEDULED, SD_SCHEDULED or SD_READY", SD_task_get_name(dst));
+
+ DEBUG2("SD_task_dependency_add: src = %s, dst = %s", SD_task_get_name(src), SD_task_get_name(dst));
+ for (i = 0; i < length && !found; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ found = (dependency->dst == dst);
+ DEBUG2("Dependency %d: dependency->dst = %s", i, SD_task_get_name(dependency->dst));
+ }
+
+ if (found)
+ THROW2(arg_error, 0, "A dependency already exists between task '%s' and task '%s'",
+ SD_task_get_name(src), SD_task_get_name(dst));
+
+ dependency = xbt_new(s_SD_dependency_t, 1);
+
+ if (name != NULL)
+ dependency->name = xbt_strdup(name);
+ else
+ dependency->name = NULL;
+
+ dependency->data = data;
+ dependency->src = src;
+ dependency->dst = dst;
+
+ /* src must be executed before dst */
+ xbt_dynar_push(src->tasks_after, &dependency);
+ xbt_dynar_push(dst->tasks_before, &dependency);
+
+ /* if the task was ready, then dst->tasks_before is not empty anymore,
+ so we must go back to state SD_SCHEDULED */
+ if (__SD_task_is_ready(dst)) {
+ DEBUG1("SD_task_dependency_add: %s was ready and becomes scheduled!", SD_task_get_name(dst));
+ __SD_task_set_state(dst, SD_SCHEDULED);
+ }
+
+ /* __SD_print_dependencies(src);
+ __SD_print_dependencies(dst); */
}
-/* Removes a dependency between two tasks.
+/**
+ * \brief Indacates whether there is a dependency between two tasks.
+ *
+ * \param src a task
+ * \param dst a task depending on \a src
*/
-void SG_task_dependency_remove(SG_task_t src, SG_task_t dst) {
+int SD_task_dependency_exists(SD_task_t src, SD_task_t dst) {
+ xbt_dynar_t dynar;
+ int length;
+ int i;
+ SD_dependency_t dependency;
+
+ SD_CHECK_INIT_DONE();
xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
- /* TODO */
+
+ dynar = src->tasks_after;
+ length = xbt_dynar_length(dynar);
+
+ for (i = 0; i < length; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ if (dependency->dst == dst) return 1;
+ }
+ return 0;
}
-/* Returns the state of a task: SG_SCHEDULED, SG_RUNNING, SG_DONE or SG_FAILED.
+/**
+ * \brief Remove a dependency between two tasks
+ *
+ * \param src a task
+ * \param dst a task depending on \a src
+ * \see SD_task_dependency_add()
*/
-SG_task_state_t SG_task_get_state(SG_task_t task) {
- xbt_assert0(task, "Invalid parameter");
- return task->state;
+void SD_task_dependency_remove(SD_task_t src, SD_task_t dst) {
+
+ xbt_dynar_t dynar;
+ int length;
+ int found = 0;
+ int i;
+ SD_dependency_t dependency;
+
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
+
+ /* remove the dependency from src->tasks_after */
+ dynar = src->tasks_after;
+ length = xbt_dynar_length(dynar);
+
+ for (i = 0; i < length && !found; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ if (dependency->dst == dst) {
+ xbt_dynar_remove_at(dynar, i, NULL);
+ found = 1;
+ }
+ }
+ if (!found)
+ THROW4(arg_error, 0,
+ "No dependency found between task '%s' and '%s': task '%s' is not a successor of task '%s'",
+ SD_task_get_name(src), SD_task_get_name(dst), SD_task_get_name(dst), SD_task_get_name(src));
+
+ /* remove the dependency from dst->tasks_before */
+ dynar = dst->tasks_before;
+ length = xbt_dynar_length(dynar);
+ found = 0;
+
+ for (i = 0; i < length && !found; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ if (dependency->src == src) {
+ xbt_dynar_remove_at(dynar, i, NULL);
+ __SD_task_dependency_destroy(dependency);
+ found = 1;
+ }
+ }
+ /* should never happen... */
+ xbt_assert4(found, "SimDag error: task '%s' is a successor of '%s' but task '%s' is not a predecessor of task '%s'",
+ SD_task_get_name(dst), SD_task_get_name(src), SD_task_get_name(src), SD_task_get_name(dst));
+
+ /* if the task was scheduled and dst->tasks_before is empty now, we can make it ready */
+ if (xbt_dynar_length(dst->tasks_before) == 0 && __SD_task_is_scheduled(dst))
+ __SD_task_set_state(dst, SD_READY);
+
+ /* __SD_print_dependencies(src);
+ __SD_print_dependencies(dst);*/
+}
+
+/**
+ * \brief Returns the user data associated with a dependency between two tasks
+ *
+ * \param src a task
+ * \param dst a task depending on \a src
+ * \return the user data associated with this dependency (can be \c NULL)
+ * \see SD_task_dependency_add()
+ */
+void *SD_task_dependency_get_data(SD_task_t src, SD_task_t dst) {
+
+ xbt_dynar_t dynar;
+ int length;
+ int found = 0;
+ int i;
+ SD_dependency_t dependency;
+
+
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
+
+ dynar = src->tasks_after;
+ length = xbt_dynar_length(dynar);
+
+ for (i = 0; i < length && !found; i++) {
+ xbt_dynar_get_cpy(dynar, i, &dependency);
+ found = (dependency->dst == dst);
+ }
+ if (!found)
+ THROW2(arg_error, 0, "No dependency found between task '%s' and '%s'", SD_task_get_name(src), SD_task_get_name(dst));
+ return dependency->data;
+}
+
+/* temporary function for debugging */
+static void __SD_print_watch_points(SD_task_t task) {
+ static const int state_masks[] = {SD_SCHEDULED, SD_RUNNING, SD_READY, SD_DONE, SD_FAILED};
+ static const char* state_names[] = {"scheduled", "running", "ready", "done", "failed"};
+ int i;
+
+ INFO2("Task '%s' watch points (%x): ", SD_task_get_name(task), task->watch_points);
+
+
+ for (i = 0; i < 5; i++) {
+ if (task->watch_points & state_masks[i])
+ INFO1("%s ", state_names[i]);
+ }
}
-/* Adds a watch point to a task.
- SG_simulate will stop as soon as the state of this task is the one given in argument.
- Watch point is then automatically removed.
+/**
+ * \brief Adds a watch point to a task
+ *
+ * SD_simulate() will stop as soon as the \ref e_SD_task_state_t "state" of this
+ * task becomes the one given in argument. The
+ * watch point is then automatically removed.
+ *
+ * \param task a task
+ * \param state the \ref e_SD_task_state_t "state" you want to watch
+ * (cannot be #SD_NOT_SCHEDULED)
+ * \see SD_task_unwatch()
*/
-void SG_task_watch(SG_task_t task, SG_task_state_t state) {
- xbt_assert0(task, "Invalid parameter");
- /* TODO */
+void SD_task_watch(SD_task_t task, e_SD_task_state_t state) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ if (state & SD_NOT_SCHEDULED)
+ THROW0(arg_error, 0, "Cannot add a watch point for state SD_NOT_SCHEDULED");
+
+ task->watch_points = task->watch_points | state;
+ /* __SD_print_watch_points(task);*/
}
-/* Removes a watch point from a task.
+/**
+ * \brief Removes a watch point from a task
+ *
+ * \param task a task
+ * \param state the \ref e_SD_task_state_t "state" you no longer want to watch
+ * \see SD_task_watch()
*/
-void SG_task_unwatch(SG_task_t task, SG_task_state_t state) {
- xbt_assert0(task, "Invalid parameter");
- /* TODO */
+void SD_task_unwatch(SD_task_t task, e_SD_task_state_t state) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert0(state != SD_NOT_SCHEDULED,
+ "SimDag error: Cannot have a watch point for state SD_NOT_SCHEDULED");
+
+ task->watch_points = task->watch_points & ~state;
+ /* __SD_print_watch_points(task);*/
}
-/* Unschedules a task.
- Change state and rerun
+/**
+ * \brief Returns an approximative estimation of the execution time of a task.
+ *
+ * The estimation is very approximative because the value returned is the time
+ * the task would take if it was executed now and if it was the only task.
+ *
+ * \param task the task to evaluate
+ * \param workstation_nb number of workstations on which the task would be executed
+ * \param workstation_list the workstations on which the task would be executed
+ * \param computation_amount computation amount for each workstation
+ * \param communication_amount communication amount between each pair of workstations
+ * \param rate task execution speed rate
+ * \see SD_schedule()
*/
-void SG_task_unschedule(SG_task_t task) {
- xbt_assert0(task, "Invalid parameter");
- /* TODO */
+double SD_task_get_execution_time(SD_task_t task,
+ int workstation_nb,
+ const SD_workstation_t *workstation_list,
+ const double *computation_amount,
+ const double *communication_amount,
+ double rate) {
+ double time, max_time = 0.0;
+ int i, j;
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL && workstation_nb > 0 && workstation_list != NULL &&
+ computation_amount != NULL && communication_amount != NULL,
+ "Invalid parameter");
+
+ /* the task execution time is the maximum execution time of the parallel tasks */
+
+ for (i = 0; i < workstation_nb; i++) {
+ time = SD_workstation_get_computation_time(workstation_list[i], computation_amount[i]);
+
+ for (j = 0; j < workstation_nb; j++) {
+ time += SD_route_get_communication_time(workstation_list[i], workstation_list[j],
+ communication_amount[i * workstation_nb + j]);
+ }
+
+ if (time > max_time) {
+ max_time = time;
+ }
+ }
+ return max_time * SD_task_get_amount(task);
}
-/* Destroys a task. The user data (if any) should have been destroyed first.
+/**
+ * \brief Schedules a task
+ *
+ * The task state must be #SD_NOT_SCHEDULED.
+ * Once scheduled, a task will be executed as soon as possible in SD_simulate(),
+ * i.e. when its dependencies are satisfied.
+ *
+ * \param task the task you want to schedule
+ * \param workstation_nb number of workstations on which the task will be executed
+ * \param workstation_list the workstations on which the task will be executed
+ * \param computation_amount computation amount for each workstation
+ * \param communication_amount communication amount between each pair of workstations
+ * \param rate task execution speed rate
+ * \see SD_task_unschedule()
*/
-void SG_task_destroy(SG_task_t task) {
- if (task->name)
- free(task->name);
+void SD_task_schedule(SD_task_t task, int workstation_nb,
+ const SD_workstation_t *workstation_list, const double *computation_amount,
+ const double *communication_amount, double rate) {
+
+ int communication_nb;
+
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert0(workstation_nb > 0, "workstation_nb must be positive");
+
+ if (!__SD_task_is_not_scheduled(task))
+ THROW1(arg_error, 0, "Task '%s' has already been scheduled", SD_task_get_name(task));
+
+ task->workstation_nb = workstation_nb;
+ task->rate = rate;
+
+ task->computation_amount = xbt_new(double, workstation_nb);
+ memcpy(task->computation_amount, computation_amount, sizeof(double) * workstation_nb);
+
+ communication_nb = workstation_nb * workstation_nb;
+ task->communication_amount = xbt_new(double, communication_nb);
+ memcpy(task->communication_amount, communication_amount, sizeof(double) * communication_nb);
+
+ task->workstation_list = xbt_new(SD_workstation_t, workstation_nb);
+ memcpy(task->workstation_list, workstation_list, sizeof(SD_workstation_t) * workstation_nb);
+
+ /* update the task state */
+ if (xbt_dynar_length(task->tasks_before) == 0)
+ __SD_task_set_state(task, SD_READY);
+ else
+ __SD_task_set_state(task, SD_SCHEDULED);
+}
+
+/**
+ * \brief Unschedules a task
+ *
+ * The task state must be #SD_SCHEDULED, #SD_READY, #SD_RUNNING or #SD_FAILED.
+ * If you call this function, the task state becomes #SD_NOT_SCHEDULED.
+ * Call SD_task_schedule() to schedule it again.
+ *
+ * \param task the task you want to unschedule
+ * \see SD_task_schedule()
+ */
+void SD_task_unschedule(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ if (task->state_set != sd_global->scheduled_task_set &&
+ task->state_set != sd_global->ready_task_set &&
+ task->state_set != sd_global->running_task_set &&
+ task->state_set != sd_global->failed_task_set)
+ THROW1(arg_error, 0, "Task %s: the state must be SD_SCHEDULED, SD_READY, SD_RUNNING or SD_FAILED",
+ SD_task_get_name(task));
+
+ if (__SD_task_is_scheduled_or_ready(task)) /* if the task is scheduled or ready */
+ __SD_task_destroy_scheduling_data(task);
+
+ if (__SD_task_is_running(task)) /* the task should become SD_FAILED */
+ surf_workstation_model->common_public->action_cancel(task->surf_action);
+ else
+ __SD_task_set_state(task, SD_NOT_SCHEDULED);
+ task->remains = task->amount;
+ task->start_time = -1.0;
+}
+
+/* Destroys the data memorised by SD_task_schedule. Task state must be SD_SCHEDULED or SD_READY.
+ */
+static void __SD_task_destroy_scheduling_data(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ if (!__SD_task_is_scheduled_or_ready(task) && !__SD_task_is_in_fifo(task))
+ THROW1(arg_error, 0, "Task '%s' must be SD_SCHEDULED, SD_READY or SD_IN_FIFO", SD_task_get_name(task));
+
+ xbt_free(task->computation_amount);
+ xbt_free(task->communication_amount);
+}
+
+/* Runs a task. This function is directly called by __SD_task_try_to_run if the task
+ * doesn't have to wait in fifos. Otherwise, it is called by __SD_task_just_done when
+ * the task gets out of its fifos.
+ */
+void __SD_task_really_run(SD_task_t task) {
+
+ int i;
+ void **surf_workstations;
+
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert2(__SD_task_is_ready_or_in_fifo(task), "Task '%s' is not ready or in a fifo! Task state: %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+ xbt_assert1(task->workstation_list != NULL, "Task '%s': workstation_list is NULL!", SD_task_get_name(task));
+
+
+
+ DEBUG1("Really running task '%s'", SD_task_get_name(task));
+
+ /* set this task as current task for the workstations in sequential mode */
+ for (i = 0; i < task->workstation_nb; i++) {
+ if (SD_workstation_get_access_mode(task->workstation_list[i]) == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ task->workstation_list[i]->current_task = task;
+ xbt_assert0(__SD_workstation_is_busy(task->workstation_list[i]), "The workstation should be busy now");
+ }
+ }
+
+ DEBUG1("Task '%s' set as current task for its workstations", SD_task_get_name(task));
+
+ /* start the task */
+
+ /* we have to create a Surf workstation array instead of the SimDag workstation array */
+ surf_workstations = xbt_new(void*, task->workstation_nb);
+
+ for (i = 0; i < task->workstation_nb; i++) {
+ surf_workstations[i] = task->workstation_list[i]->surf_workstation;
+ }
+
+ task->surf_action = NULL;
+ if((task->workstation_nb==1) &&
+ (task->communication_amount[0]==0.0)) {
+ task->surf_action = surf_workstation_model->extension_public->
+ execute(surf_workstations[0], task->computation_amount[0]);
+ } else if((task->workstation_nb==1) &&
+ (task->computation_amount[0]==0.0)) {
+ task->surf_action = surf_workstation_model->extension_public->
+ communicate(surf_workstations[0], surf_workstations[0],
+ task->communication_amount[0],task->rate);
+ } else if((task->workstation_nb==2) &&
+ (task->computation_amount[0]==0.0)&&
+ (task->computation_amount[1]==0.0)) {
+ int nb=0;
+ double value=0.0;
+
+ for (i = 0; i < task->workstation_nb*task->workstation_nb; i++) {
+ if(task->communication_amount[i]>0.0) {
+ nb++;
+ value = task->communication_amount[i];
+ }
+ }
+ if(nb==1) {
+ task->surf_action = surf_workstation_model->extension_public->
+ communicate(surf_workstations[0], surf_workstations[1],
+ value, task->rate);
+ }
+ }
+ if(!task->surf_action) {
+ double *computation_amount = xbt_new(double, task->workstation_nb);
+ double *communication_amount = xbt_new(double, task->workstation_nb *
+ task->workstation_nb);
+
+ memcpy(computation_amount, task->computation_amount, sizeof(double) *
+ task->workstation_nb);
+ memcpy(communication_amount, task->communication_amount,
+ sizeof(double) * task->workstation_nb * task->workstation_nb);
+
+ task->surf_action = surf_workstation_model->extension_public->
+ execute_parallel_task(task->workstation_nb,
+ surf_workstations,
+ computation_amount,
+ communication_amount,
+ task->amount,
+ task->rate);
+ } else {
+ xbt_free(surf_workstations);
+ }
+
+ surf_workstation_model->common_public->action_set_data(task->surf_action, task);
+ task->state_changed = 1;
+
+ DEBUG1("surf_action = %p", task->surf_action);
+
+ __SD_task_destroy_scheduling_data(task); /* now the scheduling data are not useful anymore */
+ __SD_task_set_state(task, SD_RUNNING);
+ xbt_assert2(__SD_task_is_running(task), "Bad state of task '%s': %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+
+}
+
+/* Tries to run a task. This function is called by SD_simulate() when a scheduled task becomes SD_READY
+ * (ie when its dependencies are satisfied).
+ * If one of the workstations where the task is scheduled on is busy (in sequential mode),
+ * the task doesn't start.
+ * Returns whether the task has started.
+ */
+int __SD_task_try_to_run(SD_task_t task) {
+
+ int can_start = 1;
+ int i;
+ SD_workstation_t workstation;
+
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert2(__SD_task_is_ready(task), "Task '%s' is not ready! Task state: %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+
+
+ for (i = 0; i < task->workstation_nb; i++) {
+ can_start = !__SD_workstation_is_busy(task->workstation_list[i]);
+ }
+
+ DEBUG2("Task '%s' can start: %d", SD_task_get_name(task), can_start);
+
+ if (!can_start) { /* if the task cannot start and is not in the fifos yet*/
+ for (i = 0; i < task->workstation_nb; i++) {
+ workstation = task->workstation_list[i];
+ if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ DEBUG2("Pushing task '%s' in the fifo of workstation '%s'", SD_task_get_name(task),
+ SD_workstation_get_name(workstation));
+ xbt_fifo_push(workstation->task_fifo, task);
+ }
+ }
+ __SD_task_set_state(task, SD_IN_FIFO);
+ xbt_assert2(__SD_task_is_in_fifo(task), "Bad state of task '%s': %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+ DEBUG1("Task '%s' state is now SD_IN_FIFO", SD_task_get_name(task));
+ }
+ else {
+ __SD_task_really_run(task);
+ }
+
+ return can_start;
+}
+
+/* This function is called by SD_simulate when a task is done.
+ * It updates task->state and task->action and executes if necessary the tasks
+ * which were waiting in fifos for the end of `task'
+ */
+void __SD_task_just_done(SD_task_t task) {
+ int i, j;
+ SD_workstation_t workstation;
+
+ SD_task_t candidate;
+ int candidate_nb = 0;
+ int candidate_capacity = 8;
+ SD_task_t *candidates;
+ int can_start = 1;
+
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert1(__SD_task_is_running(task), "The task must be running! Task state: %d", SD_task_get_state(task));
+ xbt_assert1(task->workstation_list != NULL, "Task '%s': workstation_list is NULL!", SD_task_get_name(task));
+
+
+ candidates = xbt_new(SD_task_t, 8);
+
+ __SD_task_set_state(task, SD_DONE);
+ surf_workstation_model->common_public->action_free(task->surf_action);
+ task->surf_action = NULL;
+
+ DEBUG0("Looking for candidates");
+
+ /* if the task was executed on sequential workstations,
+ maybe we can execute the next task of the fifo for each workstation */
+ for (i = 0; i < task->workstation_nb; i++) {
+ workstation = task->workstation_list[i];
+ DEBUG2("Workstation '%s': access_mode = %d", SD_workstation_get_name(workstation), workstation->access_mode);
+ if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ xbt_assert1(workstation->task_fifo != NULL, "Workstation '%s' has sequential access but no fifo!",
+ SD_workstation_get_name(workstation));
+ xbt_assert2(workstation->current_task = task, "Workstation '%s': current task should be '%s'",
+ SD_workstation_get_name(workstation), SD_task_get_name(task));
+
+ /* the task is over so we can release the workstation */
+ workstation->current_task = NULL;
+
+ DEBUG0("Getting candidate in fifo");
+ candidate = xbt_fifo_get_item_content(xbt_fifo_get_first_item(workstation->task_fifo));
+
+ if (candidate != NULL) {
+ DEBUG1("Candidate: '%s'", SD_task_get_name(candidate));
+ xbt_assert2(__SD_task_is_in_fifo(candidate), "Bad state of candidate '%s': %d",
+ SD_task_get_name(candidate), SD_task_get_state(candidate));
+ }
+
+ DEBUG1("Candidate in fifo: %p", candidate);
+
+ /* if there was a task waiting for my place */
+ if (candidate != NULL) {
+ /* Unfortunately, we are not sure yet that we can execute the task now,
+ because the task can be waiting more deeply in some other workstation's fifos...
+ So we memorize all candidate tasks, and then we will check for each candidate
+ whether or not all its workstations are available. */
+
+ /* realloc if necessary */
+ if (candidate_nb == candidate_capacity) {
+ candidate_capacity *= 2;
+ candidates = xbt_realloc(candidates, sizeof(SD_task_t) * candidate_capacity);
+ }
+
+ /* register the candidate */
+ candidates[candidate_nb++] = candidate;
+ candidate->fifo_checked = 0;
+ }
+ }
+ }
+
+ DEBUG1("Candidates found: %d", candidate_nb);
+
+ /* now we check every candidate task */
+ for (i = 0; i < candidate_nb; i++) {
+ candidate = candidates[i];
+
+ if (candidate->fifo_checked) {
+ continue; /* we have already evaluated that task*/
+ }
+
+ xbt_assert2(__SD_task_is_in_fifo(candidate), "Bad state of candidate '%s': %d",
+ SD_task_get_name(candidate), SD_task_get_state(candidate));
+
+ for (j = 0; j < candidate->workstation_nb && can_start; j++) {
+ workstation = candidate->workstation_list[j];
+
+ /* I can start on this workstation if the workstation is shared
+ or if I am the first task in the fifo */
+ can_start = workstation->access_mode == SD_WORKSTATION_SHARED_ACCESS ||
+ candidate == xbt_fifo_get_item_content(xbt_fifo_get_first_item(workstation->task_fifo));
+ }
+
+ DEBUG2("Candidate '%s' can start: %d", SD_task_get_name(candidate), can_start);
+
+ /* now we are sure that I can start! */
+ if (can_start) {
+ for (j = 0; j < candidate->workstation_nb && can_start; j++) {
+ workstation = candidate->workstation_list[j];
+
+ /* update the fifo */
+ if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ candidate = xbt_fifo_shift(workstation->task_fifo); /* the return value is stored just for debugging */
+ DEBUG1("Head of the fifo: '%s'", (candidate != NULL) ? SD_task_get_name(candidate) : "NULL");
+ xbt_assert0(candidate == candidates[i], "Error in __SD_task_just_done: bad first task in the fifo");
+ }
+ } /* for each workstation */
+
+ /* finally execute the task */
+ DEBUG2("Task '%s' state: %d", SD_task_get_name(candidate), SD_task_get_state(candidate));
+ __SD_task_really_run(candidate);
+
+ DEBUG4("Calling __SD_task_is_running: task '%s', state set: %p, running_task_set: %p, is running: %d",
+ SD_task_get_name(candidate), candidate->state_set, sd_global->running_task_set, __SD_task_is_running(candidate));
+ xbt_assert2(__SD_task_is_running(candidate), "Bad state of task '%s': %d",
+ SD_task_get_name(candidate), SD_task_get_state(candidate));
+ DEBUG0("Okay, the task is running.");
+
+ } /* can start */
+ candidate->fifo_checked = 1;
+ } /* for each candidate */
+
+ xbt_free(candidates);
+}
+
+/* Remove all dependencies associated with a task. This function is called when the task is destroyed.
+ */
+static void __SD_task_remove_dependencies(SD_task_t task) {
+ /* we must destroy the dependencies carefuly (with SD_dependency_remove)
+ because each one is stored twice */
+ SD_dependency_t dependency;
+ while (xbt_dynar_length(task->tasks_before) > 0) {
+ xbt_dynar_get_cpy(task->tasks_before, 0, &dependency);
+ SD_task_dependency_remove(dependency->src, dependency->dst);
+ }
+
+ while (xbt_dynar_length(task->tasks_after) > 0) {
+ xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
+ SD_task_dependency_remove(dependency->src, dependency->dst);
+ }
+}
+
+/**
+ * \brief Returns the start time of a task
+ *
+ * The task state must be SD_RUNNING, SD_DONE or SD_FAILED.
+ *
+ * \param task: a task
+ * \return the start time of this task
+ */
+double SD_task_get_start_time(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ if(task->surf_action)
+ return surf_workstation_model->common_public->action_get_start_time(task->surf_action);
+ else
+ return task->start_time;
+}
+
+/**
+ * \brief Returns the finish time of a task
+ *
+ * The task state must be SD_RUNNING, SD_DONE or SD_FAILED.
+ * If the state is not completed yet, the returned value is an
+ * estimation of the task finish time. This value can fluctuate
+ * until the task is completed.
+ *
+ * \param task: a task
+ * \return the start time of this task
+ */
+double SD_task_get_finish_time(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ if(task->surf_action) /* should never happen as actions are destroyed right after their completion */
+ return surf_workstation_model->common_public->action_get_finish_time(task->surf_action);
+ else
+ return task->finish_time;
+}
+
+/**
+ * \brief Destroys a task.
+ *
+ * The user data (if any) should have been destroyed first.
+ *
+ * \param task the task you want to destroy
+ * \see SD_task_create()
+ */
+void SD_task_destroy(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+
+ DEBUG1("Destroying task %s...", SD_task_get_name(task));
+
+ __SD_task_remove_dependencies(task);
+
+ /* if the task was scheduled or ready we have to free the scheduling parameters */
+ if (__SD_task_is_scheduled_or_ready(task))
+ __SD_task_destroy_scheduling_data(task);
+
+ if (task->name != NULL)
+ xbt_free(task->name);
+
+ if (task->surf_action != NULL)
+ surf_workstation_model->common_public->action_free(task->surf_action);
+
+ if (task->workstation_list != NULL)
+ xbt_free(task->workstation_list);
+
+ xbt_dynar_free(&task->tasks_before);
+ xbt_dynar_free(&task->tasks_after);
+ xbt_free(task);
+
+ sd_global->task_number--;
- /* TODO: dependencies + watch */
- free(task);
+ DEBUG0("Task destroyed.");
}
